Nayblue2002
23.10.2020 •
Mathematics
The decay rate (k) is 2.2% per year = -0.022
The half life is ___ years.
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Ответ:
31.5 years.
Step-by-step explanation:
Half life is given by
. Where we use the natural logarithm. Plugging in a value of 
we get: 31.5 years for the half life.
Ответ:
Option B. 4
Step-by-step explanation:
we know that
Applying the Intersecting Secants Theorem
substitute the values
Solve the quadratic equation
Using a graphing tool
The solution is x=4
see the attached figure